US10762835B2ActiveUtilityA1
Display device and driving method thereof
Est. expiryDec 20, 2037(~11.5 yrs left)· nominal 20-yr term from priority
G09G 3/3233G09G 2320/043G09G 2300/043G06F 17/10G09G 2300/0842G09G 3/3291G09G 2300/0819G09G 2320/029G09G 2320/048G09G 3/3225G09G 2320/045
48
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Cited by
2
References
11
Claims
Abstract
The present disclosure a display device includes: a display panel including subpixels displaying an image; and a life controller controlling at least any one of a compensation rate and a delay rate of the subpixels on the basis of usage data obtained by calculating usage of the display panel and life data of the subpixels.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A display device, comprising:
a display panel including subpixels configured to display an image; and
a life controller configured to control at least any one of a compensation rate and a delay rate of the subpixels on the basis of current usage data obtained by calculating current usage of the display panel and life data of the subpixels,
wherein the life controller includes:
a usage calculation unit configured to calculate the current usage data of the display panel;
a life reference unit configured to store the life data of the subpixels, the life data including information on positions and life information of the subpixels; and
a rate matching unit configured to compare the current usage data with the life data of the life reference unit and to control the at least any one of the compensation rate and the delay rate such that the life of the subpixels is reduced at the same rate,
wherein the life controller controls at least any one of the compensation rate and the delay rate by multiplying a constant “α” to the current usage data “I”, and the constant a may be calculated by Equation 1 below:
α=( t life,ref /τ) n /I [Equation 1]
t life =τ·I −n , I −n : usage equation, τ: life Ref
where t life indicates time required for luminance to decrease, and the life Ref is set to a constant obtained by sensing the life of an actual element.
2. The display device of claim 1 , wherein the life controller increases the delay rate if the current usage data is relatively large and decreases the delay rate if the current usage data is relatively small.
3. The display device of claim 1 , wherein the usage calculation unit includes at least one of a timer, a data accumulation calculation unit, a per-position accumulation calculation unit, and per-time accumulation calculation unit for calculation of the current usage of the display panel.
4. The display device of claim 1 , wherein the rate matching unit controls the compensation rate and the delay rate by multiplying the constant “α” to the current usage data “I” calculated by the usage calculation unit, and the constant α may be calculated by equation 1 below:
α=( t life,ref /τ) n /I [Equation 1]
T life =τ·I −n , I −n : usage equation, τ: life Ref.
where t life indicates time required for luminance to decrease, and the life Ref is set to a constant obtained by sensing the life of an actual element.
5. The display device of claim 1 , wherein
the rate matching unit compares the current usage data with data of the life reference unit and controls the compensation rate and the delay rate such that the life of the subpixels is reduced at the same rate, which may be expressed by Equation 3 below:
α( x, y, z , . . . ) * L ( x, y, z . . . )=L after [Equation 3]
x: panel order (example)
y: per-position y coordinate (example)
z: per-position x coordinate (example)
L
after
L
(
x
,
y
,
z
,
…
)
=
α
(
x
,
y
,
z
,
…
)
where L indicates a rate.
6. The display device of claim 1 , further comprising: a compensation unit configured to perform a compensation such that target luminance is obtained in the subpixels according to sensing values for the subpixels, and to output a compensation result.
7. The display device of claim 1 , further comprising: a delay unit configured to perform a degradation delay such that a degradation generated in the subpixels is delayed according to characteristics of an image displayed on the display panel, and to output a delay result.
8. A method for driving a display device, the method comprising:
storing life data of subpixels of a display panel together with corresponding position;
calculating a current usage data of the display panel when an image is displayed on the display unit; and
controlling at least any one of a compensation rate and a delay rate of the sub-pixels on the basis of the current usage data and life data of the sub-pixels,
wherein, in the controlling of at least any one of the compensation rate and the delay rate of the sub-pixels on the basis of the current usage data and life data of the sub-pixels, the compensation rate and the delay rate are controlled by multiplying a constant “α” to the current usage data “I”, wherein the constant a may be calculated by equation 1 below:
α=( t life,ref /τ) n /I [Equation 1]
t life =τ·I −n , I −n : usage equation, τ: life Ref.
where, t life indicates time required for luminance to decrease, and the life Ref is set to a constant obtained by sensing the life of an actual element.
9. The method of claim 8 , wherein the controlling of at least any one of a compensation rate and a delay rate of the sub-pixels on the basis of the current usage data and life data of the sub-pixels includes increasing the delay rate if the current usage data is relatively large and decreasing the delay rate if the current usage data is relatively small.
10. The method of claim 8 , wherein in the controlling of at least any one of a compensation rate and a delay rate of the sub-pixels on the basis of the current usage data and life data of the sub-pixels, the current usage data is compared with data of the life reference unit and the compensation rate and the delay rate are controlled such that the life of the subpixels is reduced at the same rate, which may be expressed by Equation 3 below:
α( x, y, z , . . . ) * L ( x, y, z . . . )=L after [Equation 3]
x: panel order (example)
y: per-position y coordinate (example)
z: per-position x coordinate (example)
L
after
L
(
x
,
y
,
z
,
…
)
=
α
(
x
,
y
,
z
,
…
)
where L indicates a rate.
11. The method of claim 8 , wherein the controlling of at least any one of a compensation rate and a delay rate of the sub-pixels on the basis of the current usage data and life data of the sub-pixels includes comparing the current usage data with the life data to control the at least any one of the compensation rate and the delay rate such that the life of the subpixels is reduced at the same rate.Cited by (0)
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